Yes, it's been discussed, especially when weapon customization hit. The problem is Spines isn't just a drawn weapon, it's also baked into power graphic effects. For example, Impale not only uses the normal spines, but the spine being hurled through the air.
In order to change the look of Spines, we're pretty much stuck waiting on power customization.
It's been outright stated that it has to be treated as a power, not as a weapon. So under current weapon customization rules it cannot be done. If at some point true power customization is implemented, it should be doable then, but that's currently not contemplated as far as I know.
edit: scooped.
If we are to die, let us die like men. -- Patrick Cleburne
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The rule is that they must be loved. --Jayne Fynes-Clinton, Death of an Abandoned Dog
Ah - makes sense - ty.
When you see yourself in a crowded room / do your fingers itch,are you pistol-whipped
Will you step in line or release the glitch / can you fall asleep with a panic switch
I want the metal thorns that Silver Mantis has. We already have her graphics right?
Power customization will come soon considering champions and dcuo have it.
Virtue: @Santorican
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I want the metal thorns that Silver Mantis has. We already have her graphics right?
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Not a matter of having the graphics, it's that currently 1 power=1 animation. So, even though Thorns has lots of overlap with Spines, internally in the game, the powers are different. there's no mechanism (currently) to have a power "pick" between multiple graphics.
Would be nice, certainly...and newer game engines would be expected to build this in.
I'm sure they'd like to do it just as much as we'd like to see it! 
Has there ever been talk of this? Like maybe giving spines scrappers the Thorns look from the CoV side?
When you see yourself in a crowded room / do your fingers itch,are you pistol-whipped
Will you step in line or release the glitch / can you fall asleep with a panic switch